A transportable stringed keyboard instrument includes a lightweight sound-body formed of several layers with front plate and back plate of material of high modulus of elasticity like steel or higher, with a side plate of a material of high modulus of elasticity like steel or higher, bonded to various layers between front plate and back plate. A method of forming a lightweight sound-body includes a single press procedure, wherein the sound-body is formed with bending in opposite direction compared to bending forces due to the string load. An upright piano action is optimized for space reduction so that keys can be positioned closer to the strings and a rotatable action together with the keys form a separate unit for transportation, apart from the sound-body.

A transportable stringed keyboard instrument includes a lightweight sound-body formed of several layers with front plate and back plate of material of high modulus of elasticity like steel or higher, with a side plate of a material of high modulus of elasticity like steel or higher, bonded to various layers between front plate and back plate. A method of forming a lightweight sound-body includes a single press procedure, wherein the sound-body is formed with bending in opposite direction compared to bending forces due to the string load. An upright piano action is optimized for space reduction so that keys can be positioned closer to the strings and a rotatable action together with the keys form a separate unit for transportation, apart from the sound-body.

The present disclosure relates to a piano-action. The piano-action may comprises a first moving component including a concavity structure, a second moving component including a convexity structure, wherein the convexity structure and the concavity structure are configured to match each other and capable of being clipped together, and a third moving component being thin and flexible and configured to fixedly fit between the first moving component and the second moving component when the convexity structure of the second moving component is clipped into the concavity structure of the first moving component.

Piano pedal operating device for people with disabilities, which allows for said operation by pressure exerted by the back of a user, wherein said piano comprises a first, vertical axis that may move longitudinally operated by means of the right pedal; a second, transverse axis joined to the first axis; strings operated by means of keys, designed to produce sounds; and dampers operated by the second axis, designed to prolong or extinguish the sounds produced by the strings. The device comprises a magnet attached to the first axis; an electro-permanent suction cup placed above the magnet, which it attracts in order to move the dampers away from the strings; a cable that conducts an electric current to the electro-permanent suction cup, in order to annul its attraction over the magnet, and thus bring the dampers closer to the piano strings; and a switch designed to cut the current flow.

The present disclosure relates to a method and system for calibrating a musical device. In some embodiments, a method for calibrating a musical device includes: energizing an actuator to actuate a key using a force corresponding to a first intensity level; obtaining, from a sensor, a first sensor signal representing motion information of the key corresponding to application of the force; and calibrating the musical device based on the first sensor signal.

An upright keyboard instrument reduced in depth dimension and compact as a whole. Damper levers each extend in a vertical direction and are pivotally movably supported at or in the vicinity of a longitudinal center thereof, in a side-by-side arrangement in a left-right direction at a location rearward of actions. A damper rod extends in a left-right direction. A pedal rod extends in the vertical direction and is disposed forward of the damper levers, so as to be moved upward by depression of a pedal. A damper lever drive mechanism is provided between a longitudinal end of the damper rod and an upper end of the pedal rod and drives lower portions of the damper levers such that the lower portions are pressed rearward by moving the damper rod rearward in accordance with upward movement of the pedal rod.

A leg attachment structure for a keyboard instrument including leg main bodies that support a keyboard portion from both sides, the keyboard portion in which plural keys are arranged on a key bed, wherein the leg attachment structure has plates installed on upper surfaces of the leg main bodies, the plates and the leg main bodies are fixed by inserting rod-shaped portions formed on lower surfaces of the plates into hole portions provided in the leg main bodies, and the plates are formed to be larger than an area of the upper surfaces of the leg main bodies, and installed at positions eccentric to the inner side and the rear side of the keyboard portion with respect to the upper surfaces of the leg main bodies.

A leg attachment structure for a keyboard instrument including leg main bodies that support a keyboard portion from both sides, the keyboard portion in which plural keys are arranged on a key bed, wherein the leg attachment structure has plates installed on upper surfaces of the leg main bodies, the plates and the leg main bodies are fixed by inserting rod-shaped portions formed on lower surfaces of the plates into hole portions provided in the leg main bodies, and the plates are formed to be larger than an area of the upper surfaces of the leg main bodies, and installed at positions eccentric to the inner side and the rear side of the keyboard portion with respect to the upper surfaces of the leg main bodies.

Systems and methods for providing a piano system are provided. In some embodiments, the methods include receiving a plurality of key signals related to a first performance of a piece of music, wherein each of the plurality of key signals corresponds to motion of at least one key of a piano during the first performance; generating first performance information based on the plurality of key signals; receiving musical data related to a second performance of the piece of music; receiving musical data related to a second performance of the piece of music, generating second performance information based on the musical data; and providing content for presentation on a display device based on the first performance information and the second performance information. The methods can also include receiving at least one pedal signal corresponding to motion of a pedal of the piano during the first performance, and generating first performance information based on the pedal signal.

The present disclosure relates to a piano-action. The piano-action may comprises a first moving component including a concavity structure, a second moving component including a convexity structure, wherein the convexity structure and the concavity structure are configured to match each other and capable of being clipped together, and a third moving component being thin and flexible and configured to fixedly fit between the first moving component and the second moving component when the convexity structure of the second moving component is clipped into the concavity structure of the first moving component.